| 摘要 |
PURPOSE:To expand the talkable range of radio equipment of a slave station by expanding the communicatable range of the radio equipment of each slave station for extension communication by means of the increase of transmission power or the decrease of a threshold value in identification of incoming electric field strength or the like. CONSTITUTION:Each communicatable range of the radio equipments C1, C2 of two slave stations is expanded to twice as shown in a large circle of radius R in the extension talking between the equipments C1 and C2 placed at a range of the communicatable limit point r1 from a master station. Since the two slave stations placed in this way include respectively the extension communication party in their communication range, the extension talking is attained. As the method expanding the communicatable range of the radio equipments in this case, the transmission power is increased or the threshold value of the electric field strength level identifying the presence of an incoming call at its reception section or the S/N detection threshold value of the demodulated output is decreased to 15dB from 35dB to expand its communicatable range easily. |
